[cisco-voip] 7940 invalid protocol

[Candace Holman]

Here's some info, though pretty old. How far back did you downgrade?
http://cco.cisco.com/en/US/products/sw/voicesw/ps556/products_tech_note09186a008055c1fe.shtml

Candace

Voll, Scott wrote:
>
> I downgraded some phones last night to get my broadcast paging working.
>
> Now I have some phones that didn’t booted up but display a “invalid 
> protocol” on the screen. They have unplugged and plugged back in and 
> still no good. How do I fix this? I only reset 50 phones at a time so 
> it shouldn’t have been an overwhelmed TFTP server.
>
> Thoughts?
>
> Scott
>
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